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Gunsight International
Best Airsoft Guns Parts

GSI USA - Gunsight International

Why GSI non-tilting outer barrel for airsoft?

Non-tilting Outer Barrel for Airsoft Gun

No tilting or recoiling

Silencer & Auto Tracer can be installed
Accuracy improvement
Increase slide speed

MCX HOP-UP ARM

Improved Stability
Enhanced Material Performance

Ultimate Results

Tools on Green Background

Temporary Shipping Suspension to the U.S.

Due to preparations for our upcoming product launch, shipping to the United States will be temporarily suspended from June 3rd to August 6th, 2025.

We kindly ask for your understanding during this period.
All U.S. orders will resume normal shipping from August 7th, 2025.

If you have any questions, feel free to reach out to our support team.
Thank you for your continued support!

— Team GSI

New Products

NTB for VFC M17- Attach accessories, improve accuracy(Toy only)
Regular Price$49.99Sale Price$44.99
Excluding Sales Tax
NTB for VFC M18- Attach accessories, improve accuracy(Toy only)
Regular Price$49.99Sale Price$44.99
Excluding Sales Tax
RESTOCK

GSI Aggressive Compensator for Glock Gen5 series, increases accuracy(Toy only)
Regular Price$39.99Sale Price$35.99
Excluding Sales Tax
RESTOCK

GSI VFC AR D-Type Hop-Up ARM-Dial Type(Toy Only)
Regular Price$34.00Sale Price$27.20
Excluding Sales Tax
RESTOCK

GSI VFC AR G-Type Hop-Up ARM-Guide Type(Toy Only)
Regular Price$34.00Sale Price$27.20
Excluding Sales Tax
RESTOCK

Hop-up Arm for APFG MCX, increases accuracy(Toy only)
Regular Price$22.00Sale Price$17.60
Excluding Sales Tax
HOP UP ARMS for APFG MPX, Stable hop-up(Toy only)
Regular Price$20.50Sale Price$16.40
Excluding Sales Tax
RESTOCK

Hop Up Arm for VFC MP7A1 AEG, Improved accuracy(Toy only)
Regular Price$33.00Sale Price$26.40
Excluding Sales Tax
NEW

GSI Hard Recoil Kit for VFC FN/FNC GBBR(Toy Only)
Regular Price$29.00Sale Price$23.20
Excluding Sales Tax
RESTOCK

Reinforced end plate for VFC MP7A1 (Toy Only)
Regular Price$78.00Sale Price$62.40
Excluding Sales Tax
NEW

Reinforced end plate for VFC MP7A1 with rail(Toy only)
Regular Price$76.00Sale Price$60.80
Excluding Sales Tax
NEW

GSI Hard Recoil Kit for VFC M249 GBBR-Increased recoil(Toy only)
Regular Price$29.20Sale Price$23.36
Excluding Sales Tax
GSI Expert HOP Wing Two-Way Type Hop-Up Rubber for All Seasons
Regular Price$8.99Sale Price$8.09
Excluding Sales Tax
GSI Expert HOP Wingless Two-Way Type Hop-Up Rubber for All Seasons
Regular Price$8.99Sale Price$8.09
Excluding Sales Tax
NTB for VFC G18C - Attach accessories, improve accuracy(Toy only)
Regular Price$53.99Sale Price$48.59
Excluding Sales Tax
NTB for MARUI G17 Gen4, Attach accessories, improve accuracy(Toy only)
Regular Price$49.99Sale Price$44.99
Excluding Sales Tax
NTB for VFC G19 GEN3 / 19 GEN4 / 19X / 45- Attach accessories(Toy only)
Regular Price$49.99Sale Price$44.99
Excluding Sales Tax
NTB for VFC G17GEN3, GEN4, GEN5- Attach accessories, improve accuracy(Toy only)
Regular Price$49.99Sale Price$44.99
Excluding Sales Tax
Clearance

NTB Metal Slide Set for VFC GLOCK17 GEN5 Original Type(Toy only)
Regular Price$199.99Sale Price$119.99
Excluding Sales Tax
Clearance

NTB Metal Slide Set for VFC GLOCK17 GEN5 Double Serration(Toy only)
Regular Price$199.99Sale Price$119.99
Excluding Sales Tax
Clearance

NTB Metal Slide SET for MARUI G17 GEN4(Original Type)(Toy only)
Regular Price$199.99Sale Price$119.99
Excluding Sales Tax
Clearance

NTB Metal Slide SET for MARUI Glock17 GEN4 Double Serration(Toy only)
Regular Price$199.99Sale Price$119.99
Excluding Sales Tax
Clearance

NTB Metal Slide Set for MARUI GLOCK19 GEN3 Original Type(Toy only)
Regular Price$199.99Sale Price$119.99
Excluding Sales Tax
Clearance

NTB Metal Slide Set for MARUI GLOCK19 GEN4 Original Type)(Toy only)
Regular Price$199.99Sale Price$119.99
Excluding Sales Tax
Clearance

NTB Metal Slide Set for MARUI GLOCK19 GEN4 Double Serration(Toy only)
Regular Price$199.99Sale Price$119.99
Excluding Sales Tax
Clearance

RMR MOUNT BASE FOR VFC GLOCK SERIES(Toy only)
Regular Price$24.00Sale Price$14.40
Excluding Sales Tax
NEW

GSI 'Heat' ver Barrel for VFC FN/FNC GBBR(Toy Only)
Regular Price$25.40Sale Price$20.32
Excluding Sales Tax
Power Control Recoil Weight For KSC/ KWA ERG RM4(Toy only)
Regular Price$118.00Sale Price$94.40
Excluding Sales Tax
RESTOCK

Mount 30mm for VFC PSG-1 GBBR, Better Accuracy(Toy only)
Regular Price$102.00Sale Price$81.60
Excluding Sales Tax
NEW

HAMMER HOUSING PIN for VFC Glock Series, prevents damage(Toy only)
Regular Price$1.50Sale Price$1.20
Excluding Sales Tax
GSI Expert Hop Tensioner Flat Type(Toy only)
Regular Price$4.00Sale Price$3.60
Excluding Sales Tax
Side BI-Rail for HK G36C/MP7A1/UMP(for VFC Only)(Toy only)
Regular Price$24.00Sale Price$19.20
Excluding Sales Tax
G36 Bottom Long BI-Rail for HK G36C (All Brand)(Toy only)
Regular Price$38.00Sale Price$30.40
Excluding Sales Tax
Conversion Adapter (-)13mm to (-)14mm for Non tilting Outer Barrel
Regular Price$13.80Sale Price$11.04
Excluding Sales Tax
Steel Recoil Weight Buffer KSC/ KWA AK Series & KTR GBBR (Toy only)
Regular Price$39.00Sale Price$31.20
Excluding Sales Tax
Compensator Adapter for (-)13mm Non tilting Outer Barrel
Regular Price$13.80Sale Price$11.04
Excluding Sales Tax
Stock Adapter for VFC MK20 GBBR, More durable(Toy only)
Regular Price$54.00Sale Price$43.20
Excluding Sales Tax
M9 Barrel Locking Block for MARUI NEW M9/ M9A1 airsoft gun part
Regular Price$49.90Sale Price$39.92
Excluding Sales Tax
GSI Cuboid Compensator for GSI NBT Series(Toy only)
Regular Price$32.99Sale Price$29.69
Excluding Sales Tax
NEW

GSI Dummy Pin for Elite Force M17/M18/P320, steal(Toy only)
Regular Price$3.00Sale Price$2.40
Excluding Sales Tax
GSI HammerSpring for MARUI & VFC GLOCK1 Series & ,PPQ(Toy only)
Regular Price$3.60Sale Price$2.88
Excluding Sales Tax
GSI Ultra Precise Nozzle for KSC/KWA ERG M4(Toy only)
Regular Price$11.80Sale Price$9.44
Excluding Sales Tax
NEW

ACRO Mount for MARUI G17Gen5 MOS(Toy only)
Regular Price$22.00Sale Price$17.60
Excluding Sales Tax
NEW

RMR Mount for MARUI Glock17Gen5 MOS(Toy only)
Regular Price$27.00Sale Price$21.60
Excluding Sales Tax
NEW

MOS Cover for MARUI Glock17Gen5 MOS(Toy only)
Regular Price$22.00Sale Price$17.60
Excluding Sales Tax
GSI Recoil Spring for VFC Glock19X / Glock45 [130%](Toy only)
Regular Price$8.99Sale Price$7.19
Excluding Sales Tax
GSI Recoil Spring for VFC Glock17 Gen5 [130%](Toy only)
Regular Price$8.99Sale Price$7.19
Excluding Sales Tax
GSI Recoil Spring for VFC Glock17 Gen4 [130%](Toy only)
Regular Price$8.99Sale Price$7.19
Excluding Sales Tax

Bestsellers

Our Bestsellers

GSI Hard Recoil Kit for VFC FN/FNC GBBR

GSI Hard Recoil Kit for VFC FN/FNC GBBR

GSI Hard Recoil Kit for VFC FN/FNC GBBR(Toy Only)

Regular Price$29.00Sale Price$23.20

Excluding Sales Tax

GSI 'Heat' ver Barrel for VFC FN/FNC GBBR

GSI 'Heat' ver Barrel for VFC FN/FNC GBBR

GSI 'Heat' ver Barrel for VFC FN/FNC GBBR(Toy Only)

Regular Price$25.40Sale Price$20.32

Excluding Sales Tax

NTB Metal Slide Set for VFC GLOCK17 GEN5 Original Type)

NTB Metal Slide Set for VFC GLOCK17 GEN5 Original Type)

NTB Metal Slide Set for VFC GLOCK17 GEN5 Original Type(Toy only)

Regular Price$199.99Sale Price$119.99

Excluding Sales Tax

NTB Metal Slide Set for VFC GLOCK17 GEN5 Double Serration

NTB Metal Slide Set for VFC GLOCK17 GEN5 Double Serration

NTB Metal Slide Set for VFC GLOCK17 GEN5 Double Serration(Toy only)

Regular Price$199.99Sale Price$119.99

Excluding Sales Tax

GSI VFC AR D-Type Hop-Up ARM-Dial Type

GSI VFC AR D-Type Hop-Up ARM-Dial Type

GSI VFC AR D-Type Hop-Up ARM-Dial Type(Toy Only)

Regular Price$34.00Sale Price$27.20

Excluding Sales Tax

GSI VFC AR G-Type Hop-Up ARM-Guide Type(Toy Only)

GSI VFC AR G-Type Hop-Up ARM-Guide Type(Toy Only)

GSI VFC AR G-Type Hop-Up ARM-Guide Type(Toy Only)

Regular Price$34.00Sale Price$27.20

Excluding Sales Tax

GSI Hard Recoil Kit for VFC M249 GBBR-Increased recoil

GSI Hard Recoil Kit for VFC M249 GBBR-Increased recoil

GSI Hard Recoil Kit for VFC M249 GBBR-Increased recoil(Toy only)

Regular Price$29.20Sale Price$23.36

Excluding Sales Tax

GSI Accuracy increasing compensator for Glock Gen5 series

GSI Accuracy increasing compensator for Glock Gen5 series

GSI Aggressive Compensator for Glock Gen5 series, increases accuracy(Toy only)

Regular Price$39.99Sale Price$35.99

Excluding Sales Tax

GSI Expert Hop Tensioner Flat Type

GSI Expert Hop Tensioner Flat Type

GSI Expert Hop Tensioner Flat Type(Toy only)

Regular Price$4.00Sale Price$3.60

Excluding Sales Tax

GSI Expert HOP Wing Two-Way Type Hop-Up Rubber for All Seasons

Regular Price$8.99Sale Price$8.09

Excluding Sales Tax

GSI Expert HOP Wingless Two-Way Type Hop-Up Rubber for All Seasons

Regular Price$8.99Sale Price$8.09

Excluding Sales Tax

GSI HAMMER HOUSING PIN for VFC Glock Series, prevents damage to VFC hammer housing

GSI HAMMER HOUSING PIN for VFC Glock Series, prevents damage to VFC hammer housing

HAMMER HOUSING PIN for VFC Glock Series, prevents damage(Toy only)

Regular Price$1.50Sale Price$1.20

Excluding Sales Tax

ACRO Mount for MARUI G17Gen5 MOS

ACRO Mount for MARUI G17Gen5 MOS

ACRO Mount for MARUI G17Gen5 MOS(Toy only)

Regular Price$22.00Sale Price$17.60

Excluding Sales Tax

RMR Mount for MARUI Glock17Gen5 MOS(Toy only)

RMR Mount for MARUI Glock17Gen5 MOS(Toy only)

RMR Mount for MARUI Glock17Gen5 MOS(Toy only)

Regular Price$27.00Sale Price$21.60

Excluding Sales Tax

MOS Cover for MARUI Glock17Gen5 MOS(Toy only)

MOS Cover for MARUI Glock17Gen5 MOS(Toy only)

MOS Cover for MARUI Glock17Gen5 MOS(Toy only)

Regular Price$22.00Sale Price$17.60

Excluding Sales Tax

HOP UP ARMS for APFG MPX, Stable hop-up

HOP UP ARMS for APFG MPX, Stable hop-up

HOP UP ARMS for APFG MPX, Stable hop-up(Toy only)

Regular Price$20.50Sale Price$16.40

Excluding Sales Tax

Hop-up Arm for APFG MCX, increases accuracy(Toy only)

Regular Price$22.00Sale Price$17.60

Excluding Sales Tax

GSI Recoil Spring for VFC Glock19X / Glock45 [130%](Toy only)

GSI Recoil Spring for VFC Glock19X / Glock45 [130%](Toy only)

GSI Recoil Spring for VFC Glock19X / Glock45 [130%](Toy only)

Regular Price$8.99Sale Price$7.19

Excluding Sales Tax

GSI Recoil Spring for VFC Glock17 Gen5 [130%](Toy only)

GSI Recoil Spring for VFC Glock17 Gen5 [130%](Toy only)

GSI Recoil Spring for VFC Glock17 Gen5 [130%](Toy only)

Regular Price$8.99Sale Price$7.19

Excluding Sales Tax

GSI Recoil Spring for VFC Glock17 Gen4 [130%](Toy only)

GSI Recoil Spring for VFC Glock17 Gen4 [130%](Toy only)

GSI Recoil Spring for VFC Glock17 Gen4 [130%](Toy only)

Regular Price$8.99Sale Price$7.19

Excluding Sales Tax

Power Control Recoil Weight For KSC/ KWA ERG RM4(Toy only)

Power Control Recoil Weight For KSC/ KWA ERG RM4(Toy only)

Power Control Recoil Weight For KSC/ KWA ERG RM4(Toy only)

Regular Price$118.00Sale Price$94.40

Excluding Sales Tax

Non-Tilting Outer Barrel for WE G19 Gen5, Attach accessories, increase accuracy

Non-Tilting Outer Barrel for WE G19 Gen5, Attach accessories, increase accuracy

NTB for WE G19 Gen5, Attach accessories, increase accuracy(Toy only)

Regular Price$49.99Sale Price$44.99

Excluding Sales Tax

NTB for MARUI HK45, Attach accessories, improve accuracy

NTB for MARUI HK45, Attach accessories, improve accuracy

NTB for MARUI HK45, Attach accessories, improve accuracy(Toy only)

Regular Price$49.99Sale Price$44.99

Excluding Sales Tax

Non-Tilting Outer Barrel for VFC H&K 45C/45CT - Attach accessories, improve accuracy

Non-Tilting Outer Barrel for VFC H&K 45C/45CT - Attach accessories, improve accuracy

NTB for VFC 45C / 45CT- Attach accessories, improve accuracy(Toy only)

Regular Price$49.99Sale Price$44.99

Excluding Sales Tax

If it hadn't changed,

we wouldn't have existed

Main Products

NON-TILTING BARREL
HANDGUN PARTS
RIFLE PARTS
SNIPER PARTS

Info

Contact

Customer Service:

info@gsi2003.com

Address : 25 Mauchly, suite318, Irvine, CA92618 USA

Support

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